Means for securing a sound-box to the tone-arm of talking-machines.



H. W. ARCHER. MEANS FOR SECURING A SOUND BOX TO THE TONE ARM 0F TALKING MACHINES.

APPLICATION FILED MAY I9, I9I5- Patented Jan. 16, 1917.

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HARRY wooDwAIm ARCHER, or BRIDGETCRT. CONNECTICUT, AssIeNon To AMERICAN GRAIPHOPHONE COMPANY, OF BRIDGEPORT, CCNNECTICUT; A CORPORATION or WEST VIRGIN IA.

MEANS FQR SECURING A SOUND-BOX TO THE TONE-ARM OF TALKING-MACHINES.

To all whomit may concern:

Be it known that I, HAR Y \VooowAno AR HER, a citizen of the United States of America, and a resident of Bridgeport, Connecticut, have invented a new and useful Improvement in Means for Securing a Sound-Box to the Tone-Arm of Talking- Machines, which invention is fully set forth in the following specification.

This invention relates to talking machines, and more particularly to the means for securing the sound-box thereof in proper relation with the tone-arm.

It has heretofore been proposed in talking machines to secure the sound-box to the neck of the tone-arm by providing a hub onthe rear of the sound-box, which hub has a peripheral groove extending around the same and a groove extending longitudinally of the hub and registering with the peripheral groove, which peripheral groove has a conical depression formed in the bottom thereof in suitable position to permit a conical spring-pressed pin on the tone-arnr to fit therein, so as to firmly hold the soundbox in operative position for reproduction, and at the same time the pin will yield sufficiently upon the application of power to permit the sound-box to be turned to the point where thespring-pressed pin registers with the longitudinal groove in the neck of the'sound-box to permit the latter to be removed from the tone-arm. The spring controlling said pin has heretofore been located in 'a' channel formed between an inner and an'outer flange on the neck of the tone-arm.

I This form of construction is not only expensive to manufacture but has been found to be less eflicient than is desirable in a properly constructed machine. I,

The object of the present invention is to reduce the cost of manufacture of the connection between the sound-box and the tonearm, while at the same time increasing the efficiency of the connection and improving the neatness of appearance of the device as a whole.

\Vit-h this object in view, the invention consists in the construction. arrangement and combination of parts hereinafter more fully described and then pointed out in the appended claims.

Specification of Letters Patent.

Application filed May 19, 1915.

I Patented Jan. 16, 1917. Serial No. 29,161.

The inventive idea may be embodied in a variety of mechanical forms, one of which, for the purpose of illustrating the invention, is shown in the accompanying drawings, but such drawings are for thepurpose of illustration only and not for. defining the limits of the invention, reference being had to the appended claims for this purpose.

In said drawings :Figure 1 is a broken detail plan view of a tone-arm and soundbox illustrating the invention ;.Fig. 2 is a detail view, partly in horizontal section, showing the neck of the tone-arm and the sound-box; Fig. 3 is a vertical section on the line 33 of Fig. 2; Fig. at is a vertical section on the line 41 of Fig. 2; and Fig. 5 is a perspective view of the neck of the tonearm and the pin-bearing spring that cooperates therewith.

Referring to the drawings, in which} like reference numerals indicate like parts throughout the several views, 1 indicates the tone-arm and 2 the neck thereof. Said neck at its outer sound-box receiving end'is preferably flared or enlarged, as at 3, and formed on the exterior of said flared or enlarged portion 3 is an annular groove or depression 4, a hole or opening 5 being formed through the wall of said flaredportion in the bottom of the groove. Fitting in said depression or groove 4 is a split spring ring 6, the thickness of the ring being such that, when the parts are in their normal operative position, the outer surface of the ring is approximately flush with the outer surface of the flared portion 3. This ring bears an inwardly extending projection, preferably shaped as a conically-formed inwardly-projecting pin 7 which, when the parts are in position, projects through the opening 5 in the neck of the tone-arm. The pin may be secured to the ring in any suit able manner, preferably by riveting. The sound-box 8, of any suitable form or' construction, is provided with the usualrearwardly projecting hub 9 having a peripheral groove 10 formed therein and extending part way around said hub, with which the usual longitudinally extending groove 11 registers. Two slight conical depressions 1:2 and 13 are formed in the bottom of said groove, one at each end thereof. This is the joint h'ubIfland groove heretofore commonlyusual and wellknown form bayonet.

known in'the art. I, p

In operation, and referring to Fig. 2, the

, hub 9 of ,the sound box 8 is inserted into the expanded neck 3 of the tone-arm and turned until the' longitudinal groove ll-reg'isters" with the pin 7 and is then. forced still farther inward until the rear eud'of the neck 9" on the sound-box reaches theflbottom of the expanded portion 3, at whichltinie the pin 7 is in registry with the groove 10. ""The'soundbox may then-be turned, with j the pin 7 traveling in the groove 10, the turning movement being in either direction and continue I ing until the end "of the groove 10 is reached, at which time'the pin 7 is snapped by the spring 6 into the depression 12 or 13, as the case may be. In one of the depressions, the sound-box is held withthe stylus 1% in proper position to engage the record. "When the sound-box is turned so that the pin engages the other depression in the roove 10, thesound-box is in aposition to hold the reproducing stylus out of operation with the record and facilitate the removalof the used stylus and. the enplacernent of anew stylus.

, the device is more effective in operation and less liable to get out of order than'the construction previously employed.

\Vhat is claimed is:-

1'. In a talking machine, the combination of atone-arm having an exterior peripheral groove in the end or neck-portion thereof, a spring resting in said oove with its outer surface substantially ush with theouter surface of said neck-portion, a projection on 'said'spri h'g 'extending within the said neck- 'portion,* antl .a sound-box having a hubtending with'in the said neck-portion amtengaged and held. in position by'sa dpr' "jection.

2. In a talking machine, the combination of a tone-arm having an exterior annular groove in the end orneck-portion thereof, an annular split ring resting in said groove with its outer surface substantially flush with the outer surface of said neck-portion. a projection on said ring extending within tin.

said neck-portion, and a sound-box having n hub extending within thesaid neck-porti n and, engagedand'held in position by said projection.

In atalking machine, the combinationc )f"zi" tone ,rm having an exterior annular. groove in t e end or neckportion thereof, an annular split ring resting in said groove with its outer surface substantially flush with the outer surface of said neck-portion, a projection on said ring extending within the said neck-portion, and a sound-box having a, hub extending within. the said neck-portion and provided on its outer surface with a groove extending, longitudinally thereof and registering with a second groove extending peripherally'thereof, said peripheral groove being engaged by said projection when the parts are in operativeposition.

4.111 a talking machine, the combination 1 of a tone-arm having an exterior annular groove in the end or IlCCk-POItlQIl thereof, a split spring ring resting in said groove with its outer surface substantially flush with the outer surfaceof said neck-portion, a pin rigidly secured to said spring ring and pro' jeeting through an opening in the bottom of said groove, anda sound-box having a hub extending within the said neck-portion and engaged and held in position by said pin.

In testimony whereof I have signed this specificationin the presence of two subscribing witnesses.

HARRY WOODWARD ARCHER.

Witnesses p LESLIE S. EAST}IAN, JOHN S. GRIFFITH. 

